Whole Numbers on a Number Line
Number line for whole numbers is a picture of horizontal straight line, where each whole number is shown as specially-marked point, evenly spaced on the line.
Although this pictures shows only 6 whole numbers (from 0 to 5), but arrow indicates that number line contains all whole numbers.
Number line is drawn in such way that bigger whole number is always to the right of smaller one.
For example, since 3 is bigger than 2 then 3 is drawn to the right of 2.